20984808

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{653}}^1$

素因数の和:778

約数の個数: 64

約数和(自身を含む): 57133440

約数和(自身を除く): 36148632

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 103, 104, 156, 206, 309, 312, 412, 618, 653, 824, 1236, 1306, 1339, 1959, 2472, 2612, 2678, 3918, 4017, 5224, 5356, 7836, 8034, 8489, 10712, 15672, 16068, 16978, 25467, 32136, 33956, 50934, 67259, 67912, 101868, 134518, 201777, 203736, 269036, 403554, 538072, 807108, 874367, 1614216, 1748734, 2623101, 3497468, 5246202, 6994936, 10492404, 20984808]

約数ペア:

[(1, 20984808), (2, 10492404), (3, 6994936), (4, 5246202), (6, 3497468), (8, 2623101), (12, 1748734), (13, 1614216), (24, 874367), (26, 807108), (39, 538072), (52, 403554), (78, 269036), (103, 203736), (104, 201777), (156, 134518), (206, 101868), (309, 67912), (312, 67259), (412, 50934), (618, 33956), (653, 32136), (824, 25467), (1236, 16978), (1306, 16068), (1339, 15672), (1959, 10712), (2472, 8489), (2612, 8034), (2678, 7836), (3918, 5356), (4017, 5224)]